French air traffic controllers are in the second of a planned five-day strike that has disrupted some flights at Paris-Orly airport.
Half of the flights leaving Orly were canceled Tuesday morning, while others experienced delays. Air traffic is reported normal at Charles de Gaulle airport.
The communist-led General Labor Federation union called the strike to protest government plans to centralize air traffic control for the Paris region at a single site.
The strike is the latest labor action to snarl air traffic in and around Paris in recent months. Air France cabin workers went on strike in October for five days over pay and working conditions. In December and January, Air France ground crews joined protests by unions representing more than five million French workers.
Those job actions were called to protest President Nicolas Sarkozy's announced plans to streamline the public sector by not replacing half of all retiring civil servants.